Suppose the long-run cost function of a firm is C(y) = y 2 . 5.1 [9 points] On a graph with output y on the horizontal axis, draw the average cost function and the marginal cost function. 5.2 [6 points] What is the minimum efficient scale, that is, the smallest quantity at which the long-run average cost curve attains its minimum point? 5.3 [8 points] Does this firm cost function exhibits increasing, decreasing, or constant average cost? Does it technology exhibits increasing, decreasing, or constant returns to scale?